<!DOCTYPE html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
--><!-- Testcase with flex items containing overlapping content, with
     "order" and "z-index" set on some of them, to test how that affects
     paint-order. --><html>
  
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<head>
    <title>CSS Test: Testing the paint-order of overlapping flex items with 'order' and 'z-index' set</title>
    <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
    <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#painting">
    <link rel="match" href="http://test.csswg.org/suites/css-flexbox-1_dev/nightly-unstable/html/reference/flexbox-paint-ordering-002-ref.htm">
    <style>
      body {
        line-height: 0;
      }

      .flexbox {
        display: inline-flex;
        width: 20px;
        height: 10px;
        border: 2px solid gray;
        margin-bottom: 10px;
        margin-right: 10px;
      }
      .a {
        width: 10px;
        height: 10px;
        background: lightblue;
        min-width: 0;
      }
      .b {
        width: 10px;
        height: 10px;
        background: pink;
        min-width: 0;
      }

      .aKid {
         margin-left: 3px;
         margin-top:  3px;
         width: 10px;
         height: 10px;
         background: steelblue;
         border: 1px solid blue;
      }
      .bKid {
         margin-left: 3px;
         margin-top:  6px;
         width: 10px;
         height: 10px;
         background: violet;
         border: 1px solid purple;
      }

      .on1 { order: -1; }
      .o0  { order:  0; }
      .o1  { order:  1; }
      .o2  { order:  2; }

      .zn2 { z-index: -2; }
      .zn1 { z-index: -1; }
      .z0  { z-index:  0; }
      .z1  { z-index:  1; }

    </style>
  </head>
  <body>
    <!-- order not set: -->
    <div class="flexbox">
      <div class="a"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div>

    <br>

    <!-- order set, but it matches content order, so it shouldn't matter: -->
    <div class="flexbox">
      <div class="a on1"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o0"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o0"><div class="aKid"></div></div>
      <div class="b o0"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o2"><div class="aKid"></div></div>
      <div class="b o2"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a"><div class="aKid"></div></div>
      <div class="b o0"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a"><div class="aKid"></div></div>
      <div class="b o1"><div class="bKid"></div></div>
    </div>

    <br>

    <!-- order set to reverse of content-order: -->
    <div class="flexbox">
      <div class="a o1"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a"><div class="aKid"></div></div>
      <div class="b on1"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o0"><div class="aKid"></div></div>
      <div class="b on1"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o2"><div class="aKid"></div></div>
      <div class="b o1"><div class="bKid"></div></div>
    </div>

    <br>

    <!-- order set to reverse of content-order, AND with z-index set on
         one or both items, but not such that it changes the paint order -->
    <div class="flexbox">
      <div class="a o1 z0"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o1 z1"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o1 z0"><div class="aKid"></div></div>
      <div class="b z0"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <div class="a o1 z1"><div class="aKid"></div></div>
      <div class="b z0"><div class="bKid"></div></div>
    </div>

    <br>

    <!-- order set to reverse of content-order, AND with z-index set on
         one or both items, in such a way that it affects paint order -->
    <div class="flexbox">
      <!-- 'a' is behind the container's border -->
      <div class="a o1 zn1"><div class="aKid"></div></div>
      <div class="b"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <!-- 'a' and 'b' are both behind the container's border -->
      <div class="a o1 zn1"><div class="aKid"></div></div>
      <div class="b zn1"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <!-- 'a' and 'b' are both behind the container's border,
           and 'a' is behind 'b' despite coming after it in the 'order'
           ordering-->
      <div class="a o1 zn2"><div class="aKid"></div></div>
      <div class="b zn1"><div class="bKid"></div></div>
    </div><div class="flexbox">
      <!-- 'a' and 'b' are both in front of the container's border,
           and 'a' is behind 'b' despite coming after it in the 'order'
           ordering-->
      <div class="a o1 z0"><div class="aKid"></div></div>
      <div class="b z1"><div class="bKid"></div></div>
    </div>

  </body>

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</html>